.page_head{
    width: 100vw;
    height: 20vh;
    display: block;
    background-color: #00CC00;
    /*left: 0;*/
    /*margin: 0;*/
}

.page_body{
    width: 100vw;
    height: 70vh;
    display: block;
    background-color: #1E1E1E;
    /*left: 0;*/
    /*margin: 0;*/
}

.page_footer{
    width: 100vw;
    height: 10vh;
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    z-index:10;
    background-color: #00aba9;
}